Thanks for the reply LOTR. I reloaded the program again just in case but it looks like you can't put any address in at all that it will accept, even my own. What it is doing is erasing the numbers you enter in after you click ADD.
Below the box is blank (checked or unchecked) for blacklisted hosts, so you can't scroll through anything. I assume the addresses I enter should pop up in the box after adding them though, correct?